基于时间调度表的无线传感器网络MAC协议  

Wireless sensor networks MAC protocol based on order schedule table design

作　　者：龙昭华[1] 马永建[1] 蒋贵全[1] 陈丹丹[1] 

机构地区：[1]重庆邮电大学计算机系统结构研究所,重庆400065

出　　处：《计算机工程与设计》2014年第1期56-61,共6页Computer Engineering and Design

基　　金：国家自然科学基金项目(61075019);"新一代宽带无线移动通信网"国家科技重大专项基金项目(2009ZX03004-003-04);重庆邮电大学自然科学基金项目(A2011-24)

摘　　要：为了减少能耗,MAC[1]协议的无线信道使用通常采用侦听/睡眠交替的策略。但是这种周期性睡眠机制会带来很多延迟,网络的吞吐量也不高。为了减少延迟和不必要的能耗,设计了一种预约时间调度表的AST-MAC协议(appointment schedule table MAC)。它采用侦听和睡眠交替的策略,但是它是按照调度表的进行侦听。当调度表的时间到了,节点会自动被唤醒进行侦听。实验结果表明,这种预约信道的MAC协议比起S-MAC和802.15.4减少了传输延迟,提高了网络的吞吐率。To reduce energy consumption, the wireless channel of the MAC protocol usually uses listen/sleep alternate strategy. But this periodic sleep mechanism leads to high latency and low throughput. In order to reduce high latency and unnecessary ene rgy consumption, AST-MAC （appointment schedule table MAC） protocol based on appointment schedule tables is designed. Al though the alternate strategy of listen/sleep is used the sensor node begins to listen in accordance with its schedule table. When it is the time to schedule, the sensor node is waked up to listen. The experimental result shows that the reservation channel MAC protocol compared to S-MAC and 802.15.4 reduces high latency and improves throughput.

关 键 词：MAC协议 预约信道 侦听 延迟 吞吐率 调度表 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]